title: Evaluation of nonionic adsorbent resins for removal of inhibitory compounds from corncob hydrolysate for ethanol fermentation.
abstract: The aim of this study was to investigate the effect of XAD4-column treatment on removal of several fermentation inhibitors from corncob hydrolysate (CH). From analysis using a model hydrolysate, more than 99% of 5-hydroxy-methyl furfural, furfural and vanillin were removed by this treatment, and more than 97% of the total xylose, glucose and arabinose remained in the detoxified CH (DCH). The resulting DCH was tested as a substrate for ethanol production by Saccharomyces cerevisiae and Pichia stipitis. The highest ethanol levels for S. cerevisiae were 1.40 and 4.92 g l(-1) in CH and DCH, respectively. For P. stipitis, the levels were 0 and 4.73 g l(-1) in the CH and DCH media, respectively. The levels of alcohol volumetric productivity in the DCH medium were 0.374 and 0.200 g l(-1)h(-1) for S. cerevisiae and P. stipitis, respectively.
authors.affiliation: Division of Molecular and Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan. Electronic address: hatano@gunma-u.ac.jp.
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Hatano
authors.forename: Naokazu
authors.initials: N
authors.lastname: Aoyagi
authors.forename: Takuya
authors.initials: T
authors.lastname: Miyakawa
authors.forename: Masaru
authors.initials: M
authors.lastname: Tanokura
authors.forename: Kenji
authors.initials: K
authors.lastname: Kubota
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D001547:Benzaldehydes / Q000302:isolation & purification*; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D005662:Furaldehyde / Q000302:isolation & purification*; D006868:Hydrolysis; D010843:Pichia / Q000378:metabolism; D011137:Polystyrenes / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D001547:Benzaldehydes; D011137:Polystyrenes; D011145:Polyvinyls; C012101:XAD-4 resin; C015661:amberlite XAD 7; D000431:Ethanol; C100058:vanillin; D005662:Furaldehyde
keywords: Adsorbent resin; Corncob hydrolysate; Dilute acid; Ethanol production; Inhibitory compounds